Results 21 to 30 of about 5,268,606 (258)

New Sharp Bounds for the Modified Bessel Function of the First Kind and Toader-Qi Mean

open access: yesMathematics, 2020
Let I v x be he modified Bessel function of the first kind of order v. We prove the double inequality sinh t t cosh 1 / q q t
Zhen-Hang Yang   +2 more
doaj   +1 more source

Performance enhancement of multivariable model reference optimal adaptive motor speed controller using error-dependent hyperbolic gain functions

open access: yesAutomatika, 2020
The main contribution of this paper is to formulate a robust-adaptive and stable state-space speed control strategy for DC motors. The linear-quadratic-integral (LQI) controller is utilized as the baseline controller for optimal speed-regulation ...
Omer Saleem   +3 more
doaj   +1 more source

On green’s function of second darboux problem for hyperbolic equation

open access: yesВестник КазНУ. Серия математика, механика, информатика, 2022
A definition and justify a method for constructing the Green’s function of the second Darboux problem for a two-dimensional linear hyperbolic equation of the second order in a characteristic triangle is given.
B. Derbissaly
doaj   +1 more source

Backward difference replacements of the space derivative in first order hyperbolic equations [PDF]

open access: yes, 1983
Two families of two-time level difference schemes are developed for the numerical solution of first order hyperbolic partial differential equations with one space variable.
Khaliq, AQM, Twizell, EH
core   +6 more sources

Robust adaptive filtering algorithms based on (inverse)hyperbolic sine function.

open access: yesPLoS ONE, 2021
Recently, adaptive filtering algorithms were designed using hyperbolic functions, such as hyperbolic cosine and tangent function. However, most of those algorithms have few parameters that need to be set, and the adaptive estimation accuracy and ...
Sihai Guan   +3 more
doaj   +1 more source

Application of the Surveillance Device in the Control System for an Electromechanical System with Distributed Parameters in its Mechanical Part

open access: yesИзвестия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2023
A system with distributed parameters in its mechanical part is considered. Examples of such a system are given. The reason for taking into account the distribution of parameters in such systems is indicated.
A. P. Korneev   +2 more
doaj   +1 more source

An Updated Evaluation of Intrathecal IgG Synthesis Markers in Relation to Oligoclonal Bands

open access: yesDiagnostics, 2023
The aim was to evaluate the performance of the latest quantitative marker for intrathecal IgG synthesis and to compare it with other established markers used for the same purpose.
Fotini Boufidou   +7 more
doaj   +1 more source

Numerically Stable form of Green’s Function for a Free-Free Uniform Timoshenko Beam

open access: yesMathematics, 2022
Beam models are widely applied in civil engineering, transport, and industry because the beams are basic structural elements. When dealing with the high-order modes of beam in the context of applying the modal analysis method, the numerical instability ...
Traian Mazilu
doaj   +1 more source

On a more accurate half-discrete Hilbert-type inequality involving hyperbolic functions

open access: yesOpen Mathematics, 2022
In this work, by the introduction of a new kernel function composed of exponent functions with several parameters, and using the method of weight coefficient, Hermite-Hadamard’s inequality, and some other techniques of real analysis, a more accurate half-
You Minghui, Sun Xia, Fan Xiansheng
doaj   +1 more source

ON GREEN’S FUNCTION OF DARBOUX PROBLEM FOR HYPERBOLIC EQUATION

open access: yesВестник КазНУ. Серия математика, механика, информатика, 2021
It is well known that the Darboux problem for the hyperbolic equation is correct, both in the senseof classical and generalized solutions. An integral form of the solution of the Darboux problem ina characteristic triangle for a general two-dimensional ...
M. A. Sadybekov, B. Derbissaly
doaj   +1 more source

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